Originally Posted by
CJ C
I have the wheel sensor (GSC10) that is supposed to kick in when the GPS is not working right. Like your exact situation. in theory
in practice, i get the same exact thing if its heavily wooded. i will be crusing at 16mph in the clear. but at the same cadence and same gear in the wooded i will get the 11mph-13mph reading. Took about two months of hammering thought that section to figure out that it was the trees not my effort.
that is not how it works. If the magnet in the wheel is present, gps is no longer used for speed calculations.